The test header now splits the keyless claim (no model call in any mode;
no API key in replay/refresh) and keeps 'jsdom resolves no layout' on one
line. The providers-only header check parses the first line and asserts
type === 'session' instead of a byte prefix, and one comment covers both
boot-time rejections (override/child sources and call-bearing fixtures).
The Agent Note (en+zh) mirrors the split claim and links the referenced
composer-width note relatively instead of a bare slug; pairing re-recorded.
Chinesezjc
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